Malicious PDF — malware analysis report

Static analysis result for SHA-256 546e0d3f5f998015…

MALICIOUS

PDF

71.6 KB Created: 2020-12-10 13:38:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: efe4183fece81e6d7d48f6cac362740c SHA-1: 240d26c485eb90b59f0e45db6b8a4f218a00ba2c SHA-256: 546e0d3f5f998015d2fbb06ddfc3bc9cf222ded69e6b795f8cb3e6da8514ff7e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/aws?utm_term=billi+billi+akh+song++guri PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416154/normal_5fba182972481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fa6962b1ee67.pdfIn PDF document text
    • https://foderojev.weebly.com/uploads/1/3/4/0/134041652/rufubixotos-bepisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403561/normal_5f925c091e3f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://static1.squarespace.com/static/5fc0e844cd1e280355d45049/t/5fc26fbffa04221c716e5385/1606578112905/28443944219.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0adfb7ee8e7075a03c77/1606224608375/megan_fox_sexy_pics.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc31e2f88c99b6d37b5b932/t/5fc3a2b9e18c5c478e6ada39/1606656697897/jodasusoluzopulilevigagam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc706dc8651a04751958791/t/5fc7f718bc205d67881d1a25/1606940440961/exploration_craft_mod_apk_gems.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f7f0c6d9645836228a25/t/5fc5b91a3c02f22b9dd2a70a/1606793498516/82996602803.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d1f60a2757459b04aa97/t/5fd1278d037b25265f1a36b9/1607542669637/make_a_christmas_list_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d73311f6a419849eeda5/t/5fc5ebb008845d0924577fb0/1606806450457/michael_jackson_say_say_say_remix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc006d0104edf1d777bfbd4/t/5fc360cf9ee0f32b87be770f/1606639826795/15802022267.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00c29085bf90c0ef85582/t/5fc15675eaf37e3b64cdfadd/1606506101752/nikitizisupaled.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC759 5200 bytes
SHA-256: 08bb0dc5d8d4625724d387422e602b0b2531b0705372d336c9c4183bf94df176
font_01_sfnt_off0000d905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD905 2952 bytes
SHA-256: b8281f72f67d6764acd4c344c1ec30db6354f81bc5d17f8b068773cc62d72152
font_02_sfnt_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 14116 bytes
SHA-256: c69617a0403c90f04cfae596c2f7c1ad064514f4210153a44c29131a32a4374f

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